<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'

// 导入注册api
import { userLoginService, userRegisterService } from '@/api/user'
import { useUserStore } from '@/stores'

import { useRouter } from 'vue-router'

const isRegister = ref(true)
// 无论是表单元素还是校验，都记得使用ref生成响应式！
// 表单数据元素
const formModel = ref({
  username: '',
  password: '',
  repassword: ''
})

// 校验设置
const rules = ref({
  username: [
    // 非空校验
    { required: true, message: '请输入用户名', trigger: 'blur' },
    // 长度校验
    { min: 5, max: 10, message: '用户名必须是5-10位的字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    // 正则校验
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15位的非空字符',
      trigger: 'blur'
    }
  ],
  repassword: [
    { required: true, message: '请再次输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15的非空字符',
      trigger: 'blur'
    },
    {
      // 自定义校验:rule是当前校验规则相关信息
      validator: (rule, value, callback) => {
        if (value !== formModel.value.password) {
          callback(new Error('两次输入密码不一致!'))
        } else {
          callback()
        }
      },
      trigger: 'blur'
    }
  ]
})

const form = ref()

// 注册请求
const register = async () => {
  await form.value.validate()
  await userRegisterService(formModel.value)
  ElMessage({
    showClose: true,
    message: '注册成功',
    type: 'success',
  })
  isRegister.value = false
}

const router = useRouter()

// 不是把useUserStore直接赋值给 userStore
const userStore = useUserStore()
// 登录请求
const login = async () => {
  await form.value.validate()
  const { data } = await userLoginService(formModel.value)
  userStore.setToken(data.token)
  ElMessage.success('登录成功')
  // router不是从router配置文件夹导入的router
  // 需要从vue-router模块导入useRouter函数再创建路由对象
  router.push('/')
}

// 切换模式重置表单
watch(isRegister, () => {
  formModel.value = {
    username: '',
    password: '',
    repassword: ''
  }
})
</script>

<template>
  <!-- el-row：创建一个行容器，包含两个 el-col 列。
  第一个 el-col：
    :span="12"：占据 12 个栅格（即一半的宽度）
    class="bg"：应用背景样式
  第二个 el-col：
    :span="6"：占据 6 个栅格
    :offset="3"：左侧偏移 3 个栅格，使其居中
    class="form"：应用表单样式 -->

  <!-- 表单 校验:
  1) el-form  => :model = "ruleForm"  绑定的form数据对象
  2) el-form  => :rules = "rules"     与form数据对象一一对应的rules规则对象
  3) 表单元素   => v-model = "ruleForm.XXX" 双向绑定form数据对象的属性
  4) el-form-item => prop="XXX" 与rules的配置属性对应 -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- el-form:标识一整个完整的表单域 -->
      <!-- ref="" 获取组件语法 -->
      <el-form ref="form" size="large" :model="formModel" :rules="rules" autocomplete="off" v-if="isRegister">
        <!-- el-form-item:标识表单域中排列的一行 -->
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" :prefix-icon="Lock" type="password" placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input v-model="formModel.repassword" :prefix-icon="Lock" type="password" placeholder="请输入再次密码"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <el-form ref="form" size="large" :model="formModel" :rules="rules" autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" name="password" :prefix-icon="Lock" type="password"
            placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space>登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>